Deploy

[the-pujon]

This pull request introduces a new CI/CD workflow for automated deployment to EC2, refactors the Docker build process to use a multi-stage build for better performance and security, and updates Docker Compose configurations for both development and production environments. Additionally, it makes minor codebase improvements and environment standardization.

CI/CD and Deployment Automation:

• Adds a GitHub Actions workflow (.github/workflows/deploy.yaml) that builds the Docker image, pushes it to Docker Hub, and deploys the application to an EC2 instance using SSH and Docker Compose.

Docker and Docker Compose Improvements:

• Refactors the Dockerfile to use a multi-stage build (builder and runtime stages), upgrades to Node.js 22-alpine, and optimizes dependency installation and build steps for production.
• Updates docker-compose.prod.yaml to use the latest Docker image from Docker Hub for the backend service, standardizing environment variables and networking.
• Adds docker-compose.override.yaml for local development, allowing the backend to be built from source with live reloading and development-friendly settings.
• Removes the backend service definition from docker-compose.yaml, centralizing environment-specific configuration in override and production files.

Minor Codebase Improvements:

• Updates the import path for PrismaClient in lib/prisma.ts to use the standard @prisma/client package.
• Changes the default application port in src/main.ts from 5500 to 5000 for consistency with Docker and Compose configurations.